Finding the Fourth Proportional to 9,391.83, 12,960.71 and 5,412.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,391.83 : 12,960.71 = 5,412.92 : x
2. Step 2: Convert to fraction form
   9,391.83/12,960.71 = 5,412.92/x
3. Step 3: Cross multiply
   9,391.83x = 12,960.71 × 5,412.92
4. Step 4: Simplify right side
   9,391.83x = 70,155,194.51
5. Step 5: Solve for x
   x = 70,155,194.51/9,391.83
6. Step 6: Final answer
   x = 7,469.81